Relations between information processing and intelligence in elderly adults |
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| Institution: | 1. Brain Recovery Project, Los Angeles, CA, USA;2. Department of Linguistics, University of Utrecht, The Netherlands;3. Department of Neurosurgery, University of California, Los Angeles, CA, USA;4. Department of Psychiatry & Biobehavioral Sciences, University of California, Los Angeles, CA, USA;5. The Intellectual and Developmental Disabilities Research Centre, University of California, Los Angeles, CA, USA;6. The Brain Research Institute, University of California, Los Angeles, CA, USA;7. Mattel Children''s Hospital, University of California, Los Angeles, CA, USA;8. David Geffen School of Medicine, University of California, Los Angeles, CA, USA;9. Linguistics Program, University of South Carolina, SC, USA;1. Behavioural Science Institute, Radboud University, P.O. Box 9104, 6500, HE, Nijmegen, The Netherlands;2. Research Institute of Child Development and Education, University of Amsterdam, Nieuwe Prinsengracht 127, 1018 WS Amsterdam, The Netherlands |
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| Abstract: | Measures of verbal intelligence and abstract reasoning were taken on a group of 31 college-aged and 32 elderly adults, together with mental-processing rates associated with choice reaction time, primary memory scanning, and lexical decoding. Group means showed that both verbal IQ and lexical decoding were intact in the elderly subjects, a relationship in keeping with theorizing of Hunt (1978). In contrast, there were large declines in both Ravens scores and a variety of CRT measures, in keeping with theorizing of Jensen (1980). The group results were upheld at the level of individual subjects in the verbal domain, but in the case of CRT, only intercept values, not slopes, correlated with abstract reasoning. Memory-scanning rates were unrelated to intelligence measures. |
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